The influence of soil temperature on the nesting cycle of the halictid bee Lasioglossum malachurum
The influence of soil temperature on the nesting cycle of the halictid bee Lasioglossum malachurum
复制标题
土壤温度对滑蜂筑巢周期的影响
作者：
N. Weissel;O. Mitesser;J. Liebig;H. Poethke;E. Strohm
摘要：变温生物的生理和行为受到温度的强烈影响。对于地面筑巢的物种，如reactively eusocial halictid蜜蜂，Lasioglossum malachurum，土壤温度可能会影响生命周期以及社会群体的复杂性，因为可以适应飞行季节的育雏数量可能会随着温度的升高而增加。我们的研究群体L. malachurum在维尔茨堡表现出显着的变异性方面的育雏数和模式的性生产。在幼虫发育期间，窝被活动暂停分开。在这项研究中，我们调查了土壤温度对筑巢活动的模式（育雏和停顿的持续时间）和育雏数量的影响。马拉丘鲁姆我们观察到在维尔茨堡附近的13个聚集，共1138个巢。正如预期的那样，土壤温度缩短了停顿的持续时间，导致筑巢周期的整体缩短。这很可能是由于土壤温度对幼虫发育的生理影响。关于筑巢策略，我们假设在有限的飞行季节内缩短筑巢周期应该会提高拥有更多工蜂育雏的策略的成功率。事实上，土壤温度较高的斑块显示出更多的育雏。然而，这种影响是相当弱的，这表明其他因素可能有更大的影响，在我们的研究种群的筑巢策略的变异。马拉丘鲁姆
Abstract.The physiology and behavior of ectothermic organisms is strongly influenced by temperature. For ground nesting species like the primitively eusocial halictid bee, Lasioglossum malachurum, soil temperature might influence the life cycle as well as the complexity of the social group since the number of broods that can be fitted into the flight season might increase with increasing temperature. Our study populationof L. malachurum at Wuerzburg exhibits a remarkable variability with respect to the number of broods and the pattern of sexual production. Broods are separated by activity pauses during which the larvae develop. In this study we investigate the influence of soil temperature on the pattern of nesting activity (duration of broods and pauses) and on the number of broods in L. malachurum. We observed a total of 1138 nests in 13 aggregations near Wuerzburg. As expected, soil temperature shortened the duration of the pauses, resulting in an overall shortening of the nesting cycle. This is most probably due to a physiological effect of soil temperature on the development of the larvae. With regard to the nesting strategies, we hypothesized that a shortening of the nesting cycle within the limited flight season should enhance the success of a strategy with more worker broods. In fact, patches with higher soil temperature showed more broods. However, this effect was rather weak, suggesting that other factors might have a stronger impact on the variability in nesting strategy within our study population of L. malachurum.